36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
//#include <math.h>
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#define PI 3.141592653589793115997963468544185161590576171875
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double cosecant_single(double a, double b) { return a / sin(b); }
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double secant_single(double a, double b) { return a / tan(b); }
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__kernel void render_frame(__global unsigned int *frame_output, __global double *mask,
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double x_step, double y_step,
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double x_start, double y_start,
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unsigned int iterations, unsigned int escape, double ratio) {
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unsigned int result;
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double x_cart = (get_global_id(0) * x_step) + x_start;
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double y_cart = (get_global_id(1) * y_step) + y_start;
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size_t img_index = (get_global_id(1) * get_global_size(1)) + get_global_id(0);
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double x = sqrt(pow(x_cart, 2) + pow(y_cart, 2));
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double y = atan(y_cart / x_cart);
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unsigned int iter;
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for(iter = 0; iter < iterations; iter++) {
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double next_x;
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double r = mask[img_index];
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next_x = (r * cosecant_single(x, y)) + ((1 - r) * secant_single(x, y));
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y = (r * cosecant_single(y, x)) + ((1 - r) * secant_single(y, x));
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x = next_x;
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if((pow(x, 2) + pow(y, 2)) >= escape) break;
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}
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frame_output[img_index] = iter;
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//frame_output[img_index] = mask[img_index] * 255;
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}
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